Bring a large pot of salted water to a boil. Add gluten-free pasta and cook according to package directions.
Once pasta is al dente, drain, reserving about 1/2 cup of pasta water. Return pasta to the pot.
In a frying pan, combine the peppers and tomatoes. Cook on medium low heat for 10-15 minutes.
In a food processor or blender, combine the roasted red pepper, chopped tomatoes, minced garlic, olive oil, red wine vinegar, smoked paprika, salt, and cayenne pepper if desired. Pulse until you reach your desired consistency. For a smoother sauce, blend longer.
Add pasta water as needed to loosen the sauce.
Remove pasta from heat. Stir in romesco sauce, sundried tomatoes, and half of the Parmesan cheese. Stir in lemon juice.
Divide pasta between bowls. Top with remaining Parmesan cheese and gluten-free toasted breadcrumbs. Serve immediately.