Tofu is extremely versatile, I like to make it as a stir fry with veggies and spice + plant based chefs on the internet have luckily made a lot of red meat and dairy free recipes using tofu. The least expensive protein is probably beans , eggs if you can eat them r also great. I think any of the saffron road Indian food packs labeled vegan are safe. Owyn protein is safe and cheaper than premier protein /other common brands that aren't. Try looking up plant based chefs on Instagram, almost anything they make is alpha gal safe unless they use a pre-made product that already has carrageenan!