your bf sounds like a nice guy, good for him for communicating effectively!
here are some ideas, i have recipes for all if you want to try any.
soups: potato, split pea, vegetable, navy bean(white bean), tortilla, minestrone
mexican food: bean and rice burrito, fajitas, tacos (i use spicy potato for filling), tostadas
curries are pretty easy and familiar to omnis too, i like using green or red curry pastes instead of the more common yellow mixes, so easy with any veggies and a can of coconut milk over rice or noodles. also making your own curry paste is fun and rewarding
more comfort foods: veggie pot pie or hand pies, cornbread, stuffing/dressing, pasta salad, potato salad, coleslaw, garlic bread
any chance of getting bf in the kitchen with you?
my bf was omni until a few months ago, i cooked meat for a few years for him, he refused to eat vegan foods (but not in a mean way just didn't think he liked it). then i taught and encouraged him to cook his own meat if he wanted to eat meat, which was good but still smelled and yucked up the kitchen. then we had financial road bumps and could not afford to buy dead animals for his pleasure and he started eating vegetarian at home. now we are finally to the point where i don't have to cook animal products for him, he does it on his own, if he wants a grilled cheese he makes it now! shopping together helps a lot too, bc i really did not like picking out cheeses (bad for my addiction to it...) and he gets exactly what he wants.
the recipes above are what we have found he enjoys with out 'missing' something like cheese or chicken.