Prep: Prepare your cheese topping. Slice the onion into half-moons, the peppers into thin slices, and mince the garlic.
Cook Pasta: Cook 500g pasta al dente, reserving at least 500ml (2 cups) of pasta water for later.
Fry Veg: Fry the onion and peppers in a casserole dish over a medium heat with a little salt and pepper and 1.5 tablespoons of olive oil.
Cook Sausages: While the veg is frying, cook 450g vegan sausages as per instructions and chop into bite-sized pieces.
Make Sauce: Add garlic to the pan and cook until fragrant. Add the smoked paprika and basil with a splash of water to help them bloom. Now, add the chopped tomatoes and about a tin's worth of water, stir in the nutritional yeast. Simmer for 10-15 minutes. Preheat the oven to 180˚C (350˚F).
Assemble: Combine sauce, sausages, and cooked pasta. Taste for seasoning and adjust with salt and black pepper. If the sauce is too thin, add a tablespoon or two of tomato paste and some of the reserved pasta water until you have the right consistency.
Top: Top with vegan liquid mozzarella.
Bake: Bake for 15-20 minutes, until golden and melted.
Finish: Take it out of the oven and brush the reserved 1/2 tablespoon of olive oil over the top. Then, add a little sprinkle of smoked paprika.