My stomach didn't tolerate salad/broccoli/cauliflower/or any kind of fruit till about the 3rd month. Week 1 was pretty much nothing - I was feeling so much pain, I couldn't eat. Week 2 - 4 was protein drinks and Cream of Chicken soup. Weeks 5 - 8, I was eating grilled chicken I ran through the food processor, refried beans and salsa pretty much 24/7.
Since then, my stomach will grumble but tolerate - tomatoes, cauliflower, broccoli, mushrooms, carrots, and (insert any fibrous vegetable here). And it grumbles but tolerates any fruit I've tried - apples, bananas, strawberries, grapes, pineapple.
All you can do is test your stomach with a very small bite and wait a few minutes to see how it responds.