onions, esp. red ones, garlic,green peppers,mushrooms, & black olives -- all saute'd in olive oil...then add a splash of balsamic vinegar

and simmer these....then you can take ripe tomatoes and blend them up
and pour over and cook this all till thick...add parsley and basil near the end.

you can add chopped tofu to the veggies for some extra protein
and shredded parmesan on top with a dab of pesto .

yum.

also for lasagna, make a "soupy" tomatoe sauce...not too thick,
and layer sauce, noodles (uncooked), ricotta, and more sauce...and
bake. the noodles soften as they cook and no need to pre-boil them