I need meal ideas for a picky eater..

maybe Greek yogurt and cereal or nuts , hummus,or tuna or salmon pouches with whole wheat bread or crackers? a half of a sandwich and a small apple? Whole wheat bread, toast or multigrain waffles with peanut or other nut butters?

Salads don't have to be mundane. Add different veggies for color and texture and taste (broccoli, chopped cucumber, carrots, celery, etc.). You can even use leftover roasted veggies from the night before. Use different greens (romaine, arugula, baby kale, mixed). Then add different proteins (tofu, chickpeas, beans, chicken, tuna, salmon) and nuts and seeds. Have you tried some "exotic" cheeses - you may feel different about feta, goat, aged shaved parmesan, etc. that can easily be sprinkled over salads for flavor boost. You can even add fruit (I like chopped figs, dates, apples, pears, pomegranate seeds, orange/grapefruit segments)
Lastly, make your own dressings. It's cheaper, healthier and you can make so many different varieties that you can have something different every day. I take one of those tiny baby food sized mason jars and add a little olive oil, an acid (a flavored vinegar, apple cider vinegar or fresh squeezed citrus juice), then a wee dab of dijon mustard (I don't like it but it helps it emulsify), S&P, whatever herbs or spices seem like they'd go well with that salad, maybe some crushed garlic or teeny bit of chopped onion/shallot, and a little honey/agave if the acid is too tart. Put lid on, shake. If taking to work, toss jar in lunchbag and dress when it's time to eat.

Check Pinterest for ideas.

Do you like quiche (its eggs and cheese but has a slightly different taste) ? You can make crustless quiches in a muffin tray and bring one in for lunch each day. If you bake a batch in one go and freeze them then you don't have to eat them all in one go.