Wash, then chop the squash and zucchini. Toss in a pot and just cover w/ water, salt if you like. Boil until tender. Drain when finished, reserving a cup of the water for later use.
Dice the onions. In a large saucepan on medium heat, melt the stick of butter and bouillon cubes. Add garlic, herbs and pepper. Add onions. Cook until onions turn clearish, stir as needed so it doesn't stick.
Mix stuffing according to package of whichever kind you buy. Substitute one cup of water w/ the broth from boiling squash/zucchini.
Add squash and zucchini to onion mixture, toss to mix, careful not to mush. Add the stuffing and cheese, toss a few more times to evenly distribute. It is not necessary to melt the cheese, as you are going to bake it.
Pour into large, oblong glass baking dish. Bake for 25 minutes or until lightly browned.