Random question about making baby food

Does anyone know if I can use peppers (sweet, of course) or tomatoes for baby food? I'm reading up on steaming, how best to purée, etc and I haven't seen those two veggies mentioned. I usually grow an extensive organic garden but didn't have time to mess with it so I only grew tomatoes and peppers. I'd love to share them with my little guy but am wondering if there is a reason not to since I never seem to see those mentioned.