Good on you for deciding to take control of the situation and do something about it!
As others have pointed out, even if you can't get a lot of money for it, getting rid of the SUV might be one way to reduce your monthly expenses just by getting it off the insurance. Whatever you save in insurance monthly can automatically go right towards paying more towards your highest interest credit card.
Groceries seem to be the most likely place for you to reduce spending though as others have said. Since you say you have a freezer full of beef, maybe start out by planning a week's worth of meals around what you've got in the freezer and what's in your pantry already, alternating a beef day with a vegetarian day (or, if you've got some on hand, chicken, pork, or seafood days). I make it a personal goal to eat one week a month only from what I've already got in the house. I don't always completely succeed, but it helps keep my pantry and freezer under control, and saves money. Also, unless you're buying fancy, expensive vegetarian ingredients (like organic imported veggies or processed meat replacements), eating vegetarian can definitely be a money saver if you do it a few days a week.
Dried beans are pretty darn cheap as far as protein goes and they have tons of fiber.
Bags of dried beans are also pretty cheap. If you've got any Hispanic or Asian grocery stores near you, you can usually find a much larger variety of beans and huge bags of rice for cheaper than at some other stores. I've got a store called Lotte Plaza near me which is Asian grocery for the most part - they have an entire huge aisle of bags and bags of dried beans, more kinds of beans than I ever knew existed, and an entire aisle of different kinds of rice in all size bags. You can sometimes also find really good prices on produce and meats from these grocery stores, and if you like tofu, the Asian supermarkets tend to have good prices on that as well. The vegetarian meals don't have to all be rice and beans either (although made right, rice and beans can be delicious and there are tons of different styles and variations). You can make
meatless chili, make your own
bean burgers, make
bean tacos, beans soups, etc. And any recipes you find that call for canned beans, just replace with 2 cups of cooked dried beans (nothing wrong with canned beans really, dried beans you cook yourself are just much cheaper, and you can cook a bunch once a week, split into 2-cup portions and freeze for later use).
Eggs can also be a pretty cheap source of protein. My sister and her husband have omelet night once a week. Getting some vegetarian and/or budget cookbooks from the library can be great inspirations for both egg meals and bean meals as well as venturing into tofu, tempeh, and seitan.
Something I haven't seen mentioned is maybe join your local freecycle group if you've got one. You never know what may be offered up, and sometimes you can get stuff for free (furniture, unopened food products or toiletries, kids clothing, books, toys, etc.). As others have mentioned yard sales, you can also try selling stuff on Craigslist, and just put whatever you make from selling directly towards the highest interest credit card.
Good luck with whatever you end up trying!
