These are more ideas and techniques rather than recipes! I have been making lots of dried beans lately - soak, drain, cover in water in crockpot, cook until soft. You can add salt, but no acid, or they won't get soft. Then I use
* black beans for bean & rice bowls, add toppings like cheese, lettuce, salsa, etc.
* pintos for pinto bean stew - when beans are cooked, drain off excess water & add tomatoes, maybe some finely chopped onion and garlic, and some chipotle chile to taste - cook until it all blends together. Serve over rice.
* chickpeas for chickpea curry - we have an Indian neighborhood nearby, so I buy spice packets & cook up with some onion, garlic, ginger & tomatoes
* white beans for soup (best with greens, which are something like $0.49/lb. right now where I live)
For meat meals, I make chicken drumsticks a lot. Chicken in the crockpot with BBQ sauce is also easy and good. I second the lettuce wraps!
For fish, I really only buy frozen tilapia filets and canned wild salmon (for sustainability reasons and being in the Midwest w/out good sources of fresh fish). I use Thai red curry (a tub costs $3-4 but lasts a long time) and coconut milk with a splash of fish sauce and some lime juice (limes 10 for $1 at the ethnic markets currently) to make fish curry with the tilapia. DH is having trouble with dairy products, so I haven't made salmon pasta bake in a while, but it's good - make a simple white sauce (saute some flour in butter, slowly add milk while whisking), mix w/ cooked pasta, canned salmon and any seasonings you want, then top w/ cheese or bread crumbs and bake. There is a Swedish version of this called Jansen's Surprise (sp?) made with sliced potatoes instead of pasta.
Other vegetarian -
* Before the dairy issues I used to also make pasta bake with red sauce and veggies (frozen spinach is good & broccoli). To make that, just mix cooked pasta with red sauce (always sales on that) and steamed veggies and top with cheese. Bake until cheese is bubbly. You could add sausage or ground meat if you eat that.
* Tofu! An easy one is tofu w/ peanut sauce (I used a mix last night, but it's easy enough to make w/ hot water to thin the peanut butter, then add your seasonings - garlic, lime, chili sauce, a touch of honey, etc.) served over brown rice w/ a green vegetable on the side.
* Lime coleslaw (I've seen cabbage as low as $0.16/lb. this week) as a side dish: shred cabbage with a carrot, mix w/ vinaigrette: oil, lime juice, garlic, salt, pepper, a little sweetener. Yummy and not gloppy like conventional coleslaw. Nice as a side dish w/ rice & chicken.
* Baked potato bar - I make these in the crockpot, too - just wrap potatoes in foil & place in crockpot w/out water, cook until soft. Top with whatever you put on baked potatoes.
Hope that helps!