Diabetic protein sources? Best friend's dad is diabetic, 1 yr vegan, hates vegetables, likes noodles and bagels. Pressure injuries exist. Any suggestions?

Sounds like he likes carbs. Oats and barley are carby and have a good protein profile.

He should be careful with all those carbs, though.

Tofu, edamame, soy curls, tvp, and beyond meat products are all very low carb protein options. Legume based pasta isn’t especially low carb but it is made from lentils or chickpeas and is high protein

Not eating veggies will just mean additional health consequences, even a blended veggie soup is better than zero veggies