Trader Joe's Tomato Basil Marina - $1.99 for 26 oz.
I think this marina is a great basic sauce, but still has a lot of flavor to it. We use it for spaghetti, spaghetti pie, or just straight up with noodles on it's own (on the nights Clint isn't home or I feel really desperate for a quick dish).
One great and easy meatless dish is whole wheat pasta with sauteed mushrooms, onions, peppers (Trader Joe's frozen bell), and broccoli all tossed in this sauce. It is a really great healthy dinner and one that our family enjoys.