Cook the pasta according to the package directions.
Combine the garlic with 1 to 2 tablespoons of water in a skillet with a lid (you’ll need it later), and sauté over medium heat until fragrant, about 2 minutes.
Meanwhile, slice the onion into four pieces and place in a food processor. Mince, then add to the skillet and sauté for 3 to 5 minutes, or until softened.
Slice the bell peppers into large chunks and place in the food processor. Mince, then incorporate into the mixture in the skillet.
Working one vegetable at a time, repeat the same step with your mushrooms, cherry tomatoes, and spinach, until you have a large veggie mince sautéing over medium heat.
Next, add the balsamic vinegar and sauté for 4 to 5 minutes until all the vegetables are incorporated.
Finally, add the pasta sauce, red pepper flakes, and basil. Stir until completely combined, bring to a boil, then cover and simmer for 10 minutes.
Enjoy over a bed of the freshly cooked whole-grain fettuccine, sprinkled with black pepper.