I am a part time vegetarian as well. Most of the meals I make are vegetarian, some vegan, and I eat some chicken and pork. I do like a cheeseburger every now and then too. My main protein sources are beans and eggs. I eat a lot of pinto beans. Great northern/white beans are good as well. Here are some recipe ideas:

Pinto Beans: - Chili - Refried Beans - Cajun Style Baked Beans - Gumbo with pinto beans - Tortilla soup with chicken and pinto beans - Peas and rice (kidney beans are used, typically)

White Beans: - Vegetable soup with white beans - Spinach/Collards with white beans - White bean hummus

Chick peas: - Mushroom loaf w/ gravy using chickpea flour, oats, nuts, etc.

Tofu: - Goes in almost any Asian cuisine (Indian, Thai, Chinese, etc...) fry it for stir fry.

For cooking meatless, I recommend using mushrooms, yeast flakes and yeast extract for adding umami flavor.