Choose a substitute based on your recipe: tofu or seitan for cooking, chickpeas or mushrooms for salads, lentils for stews.
Press firm tofu for 15-20 minutes to reduce moisture; slice mushrooms thick or cube seitan as needed.
Use equal weight for tofu, seitan, and mushrooms; scale chickpeas up by 1.25 times to match volume.
Marinate tofu or seitan for 15-20 minutes before cooking; season mushrooms and lentils during or after cooking.
Taste and adjust seasoning or texture to suit your dish for best results.