Won’t Eat

Guys I need some advice. My 15 month old will only eat snacks…eggos…sometimes toast…sometimes eggs. She will NOT eat meat or veggies or most fruits. I’ve tried feeding her and letting her feed herself. I’m really worried she’s not getting the nutrients and vitamins she needs. She has milk in the morning and at night so she’s not filling up on that. She will eat anything sugary but food she should be eating? No way. She appears healthy. Any advice?? Anything I can give her to replace the nutrients she’s not getting? I’m so worried. And it’s been a month or 2 so I don’t think it’s a phase.