Replace it with other filling and tasty proteins. There are meat alternative products such as beyond and impossible which replicate stuff like chicken, ground beef, meatballs etc but all plant based. Incorporating proteins like tofu, tempeh, and seitan is also great, as they’re less expensive and very nutritious. I’d also recommend dishes with pulses and legumes, any kinds of beans, lentils, chickpeas etc are gonna get your protein needs met and they’re just really tasty