This roasted tomato and capsicum pasta is proof that a handful of vegetables roasted until deeply caramelized can create a sauce that tastes like it took way more effort than it actually did. Sweet roasted tomatoes, peppers, shallots, and garlic get blitzed into a velvety sauce with ricotta and parmesan, then loosened with pasta water and butter for that glossy, restaurant-quality finish. It’s got a gentle kick from Calabrian chilli, a creamy richness from the cheese, and it comes together with minimal hands-on effort. This is the kind of pasta that looks like it belongs on a menu but is genuinely one of the easiest things you’ll make all week!

Understanding Your Components

1. Roasted Vegetables: Cherry tomatoes, yellow peppers, shallots, and a whole garlic bulb all roast together until soft, caramelized, and slightly charred at the edges. This slow roasting concentrates their natural sugars and creates a depth of flavor that boiling or sautéing just can’t match. The tomatoes burst and release their juices, the peppers soften and sweeten, and the garlic turns mellow and almost spreadable. This is really the foundation of the entire dish – don’t rush it.
2. Ricotta and Parmesan: Ricotta blended into the sauce gives it body and a subtle creaminess without making it heavy like a cream-based sauce would. Parmesan adds sharp, salty depth and helps thicken the sauce slightly. Together they transform the roasted vegetables from a chunky sauce into something silky and cohesive when blended.
3. Calabrian Chilli Paste: This adds a fruity, smoky heat that’s more complex than plain chilli flakes. It’s not overwhelming – just enough warmth to make the sauce interesting without overpowering the sweetness of the roasted vegetables. Harissa works as a substitute and brings its own warm, earthy spice blend if you want a slightly different flavor profile.
4. Pasta Water and Butter: These two are essential for finishing the sauce properly. Starchy pasta water loosens the thick blended sauce to the right consistency while helping it cling to the pasta rather than pooling at the bottom of the bowl. Cubed butter stirred in at the end adds glossiness and richness, giving the sauce that restaurant-style silky finish.

Tips!

Roast Until Properly Caramelized: Don’t pull the vegetables early – you want them soft, golden, and slightly charred at the edges. This is where all the flavor develops. A full 45 minutes to an hour makes a huge difference compared to a shorter roast.

Squeeze Garlic While Warm: The roasted garlic bulb is much easier to squeeze out while it’s still warm. If it cools down too much, the flesh can be harder to release cleanly from the skins.

Blend Until Smooth: Take your time blending the roasted vegetables with the ricotta and parmesan – you want a completely smooth, velvety sauce with no chunky bits of pepper skin or tomato. A high-powered blender works best here.

Save Your Pasta Water: Always reserve at least a cup of pasta water before draining. The starch in this water is what helps emulsify the sauce and gives it that glossy, clingy texture instead of a watery or separated sauce.

Add Pasta Water Gradually: Loosen the sauce a little at a time rather than dumping it all in at once. You can always add more, but it’s harder to fix a sauce that’s become too thin. You’re looking for a consistency that coats the pasta nicely without pooling.

Finish With Butter Off the Heat: Stir in the cubed butter at the end, ideally with the heat low or off completely. This creates that glossy, silky finish (similar to mounting a sauce) rather than a greasy separated one.

Taste and Adjust the Heat: Start with a smaller amount of Calabrian chilli paste or harissa and add more to taste – the heat level can vary a lot between brands, so it’s easier to build up than to fix an overly spicy sauce.

Storage and Reheating Guide

• Sauce Storage: Store the blended roasted vegetable sauce (before adding pasta) in an airtight container in the refrigerator for up to 4 days
• Assembled Pasta Storage: Store leftover pasta with sauce in an airtight container in the refrigerator for up to 3 days
• Reheating: Reheat gently on the stovetop over low-medium heat, adding a splash of water or milk to loosen the sauce back up as it will thicken when cold
• Freezing: Freeze the sauce (without pasta) for up to 2 months. Thaw overnight in the refrigerator and reheat gently before tossing with freshly cooked pasta.
• Texture Tip: The sauce will thicken significantly once refrigerated – always reheat with a little extra liquid to bring back that silky consistency

Make Ahead Tips:

• Roast Vegetables Ahead: Roast all the vegetables up to 3 days ahead and store refrigerated. This makes the final sauce assembly incredibly quick.
• Make Sauce Early: Blend the complete sauce up to 4 days ahead and refrigerate – the flavors actually deepen and meld the longer it sits
• Freeze in Batches: Double the roasted vegetables and sauce, freezing half in portions for an easy pasta night whenever you need one
• Prep the Night Before: Roast the vegetables the night before, then blend and toss with pasta the next day for a quick weeknight dinner
• Garnish Prep: Have your ricotta, grated parmesan, and fresh herbs ready to go so the final plating comes together in seconds

Ingredients

1 box of pasta
500g cherry tomatoes
2 yellow peppers/capsicums, deseeded and chopped
2 shallots, chopped
1 garlic bulb, top chopped off
100g ricotta cheese
Calabrian chilli paste or harissa, to taste
2 sprigs basil
1/2 cup parmesan cheese, grated
2-3 tbsp butter, cubed
parmesan cheese, garnish
ricotta, garnish
parsley or basil, garnish

Method – How to make Roasted Tomatoes & Peppers Pasta

1. Preheat your oven to 180C/350F.
2. In a baking tray, add in the tomatoes, peppers, shallots, garlic and drizzle generously with olive oil and season with salt and pepper. Roast the veggies until soft and golden, ~45 mins – 1 hour.
3. Once roasted, squeeze out the garlic flesh from the bulb and transfer all the roasted veggies into a blender. Add the ricotta, parmesan, Calabrian chilli paste, basil and blitz until smooth.
4. Cook your pasta to the instructions on the box. Save ~1 cup of pasta water. Drain the pasta and return into the pot.
5. Add in the sauce, a bit of pasta water at a time, butter and mix well until smooth and homogenous. Adjust pasta water to desired consistency. Season to taste. Divide onto plates and top with ricotta, grated parmesan and basil.