Ditto to Tangierine cafe. For other QS in EP I also like the cheese empanadas at La Cantina de San Angel. For TS dinner, La Hacienda has a vegetarian menu available by request and I love their enchiladas dinner. For TS lunch/dinner Tutto Italia has a nice pasta dish prepared with fresh cheese and arugula.
For QS in MK, Pecos Bill is my favorite. Tip - order a side of beans and rice and fix them up with toppings. Less expensive than ordering one of the entrees minus the meat. Another thing is if we are on the other side of the park I go for a side of mashed potatoes and green beans at Cosmic Rays. Or broccoli and cous cous at CHH. The cheese flatbread at Pinocchio Village Haus has been hit or miss for me - when fresh, it's yummy, but not so much when it's cold or been sitting a while. For TS, I have no idea - LTT used to have a tasty potato and quinoa burger but now they've switched to the family style menu that is meat heavy.
At AK, I usually snack for QS - there are several carts with things like edamame, fresh fruit, samosas, hummus and veggies. For TS, I love Yak and Yeti - they will sub tofu for the meat in their lo mein, and the portion could easily be shared. They also will sub tofu for chicken in the lettuce cup appetizer.
At HS, I have the hardest time. I've heard there is a QS that sells baked potatoes. Not sure which one but I will be researching this before our next trip. So far, I either eat Cobb salad at HBD (outside in the lounge area can be nice and relaxing, especially with a glass of wine) - anyway, they will make it without meat and add extra avocado and bleu cheese upon request - or we hop over to EP.
For sweet snacks, well there are so many options! I usually enjoy a couple of caramel peanut apples (they will slice them if you ask and they are a good option for breakfast or mid morning snack), and I really like the soft serve at Auntie Gravity's in MK Tomorrowland (sundaes and also their orange smoothie). We also have a tradition of a late night ice cream sandwich at the ice cream parlor on MK Main St. These are huge and yummy - choice of 2 soft baked cookies and a large serving of ice cream in between - so large that they are served in bowls.
Okay I've gotta stop typing now - this is making me hungry lol.