Add pasta to a large pot of salted boiling water and boil until al dente. When draining, reserve about ½ cup of the pasta water.
Heat cooking oil in a large skillet over medium heat. When hot, add diced peppers and halved tomatoes. Cook for 3-4 minutes, until veggies are justsoftening.
Stir minced garlic into veggies and let cook for 30 seconds, until fragrant. Add spinach and cook for about 2 minutes, until wilted.
In a separate medium bowl, stir together hummus, lemon juice, paprika, and 1 tablespoon reserved pasta water until smooth and creamy.
Add drained pasta to the skillet with the veggies, pour in hummus sauce, and toss together, until pasta is well coated. Add reserved pasta water 1 tablespoon at a time to thin sauce to your liking.
Stir in olives (if using), basil, red pepper flakes, salt, and pepper until combined.
Serve hummus pasta topped with crumbled feta, more basil, and toasted pine nuts, if desired.