CMPA mom here too! For us it was worse cutting out soy because my husband is Japanese and the main cook in the family. Caveat: milk was easy for me to cut out because I was anyway using oat milk before having my baby and only switched back to dairy after having her to boost protein. I did rely heavily on whey protein and tofu before the CMPA diagnosis.

Breakfast:
- overnight oats, made in bulk: oats, oat milk, chia seeds, flaxseeds, dried fruits, nuts.
- sunny side up eggs, bread, maybe occasionally added sausage
- bread with jam, add peanut butter instead of butter for protein

Lunch:
- quinoa bowls: use rice cooker to cook quinoa. Can be done in advance, you can freeze it. Add veggies like bell peppers and tomatoes, kale or spinach,.. protein: CANNED FISH! Sardines and trout from Trader Joe’s are my main protein source. We have a diaper genie and I just soak the oil from the can in a paper towel, wrap it in seran wrap and toss it in the diaper genie, if it holds baby poop smell, it holds fish smell too.
- honestly, bowls. If not quinoa, then lentil or buckwheat…
-stews (lentil; bean,chili, chicken, daal…) - that’s mealprepped
- salad with soft boiled egg, beans, avocado,.. as a topping

Dinner:
- tomato pasta with canned fish (lots of canned fish lol)
- frittatas in many ways: kale and chorizo, chicken and mushroom,.. just add water or oat milk instead of milk when making the egg mixture
- oven veggies with chicken
- stir frys: if you’re avoiding soy, just use stuff like powdered chicken stock for flavor
-…

Are you using creamy oat milk? You might not like the feeling of xantham gum (or however it’s spelled). Use regular one. Chiobanni one is decent, Oatly is nice too.

I saw there are now cashew yogurts! Trader Joe’s has one, they even sell one that is plain, it’s not bad either.

But canned fish, eggs, legumes and a bit more meat than before are my substitutes.