Heat a large sauté pan, wok, paella pan, or cast iron skillet, lightly coated with oil, over medium heat.
Break pasta into 2- to 3-inch segments and toast in hot oil until browned and toasty, about 3 to 5 minutes. Transfer to a bowl.
In the same pan, add more oil, then sauté mushrooms, eggplant, and zucchini until lightly browned and caramelized. Transfer to the bowl with pasta.
Simmer onion, peppers, and tomatoes until water is cooked out and the mixture is very thick, about 20 minutes. Be sure to season with salt and pepper. Add garlic and continue cooking for a few minutes until softened and fragrant.
Add saffron and smoked paprika, and return pasta and vegetables to the pan.
Stir to combine. Add green beans, wine, and broth. Cover and cook for 10 to 15 minutes until pasta is al dente.
Top paella with chickpeas, olives, tomatoes, lemon, peas, and fresh parsley.