Not sure what you're already feeding her, but fruits are obvious. Cut grapes into quarters. Same with cherries and check for pits. Watermelon, plum, banana, peach, berries. Kiwi might be a little tart but try it. Fruits can be slippery so at least put them in a little bowl (even the lid from a plastic container) or a sectioned toddler plate so they don't slide all over.
Raw avocado, and all kinds of cooked vegetables including carrot cubes, peas, sweet potato chunks, zucchini spears should be easy for her to mash with her gums and a few teeth. You can try things like cooked green pepper, green beans, chick peas and broccoli but don't overdo them all at once as they can make her gassy.
Eggs - chunks of scrambled eggs or an omelette work well.
French toast - make with whole grain bread and egg and some cinnamon - you don't need maple syrup because the cinnamon gives it plenty of flavor. Cut in cubes or even a long shape she can hold and bite off.
Peanut butter or almond butter sandwich cut in cubes. You can flatten the bread a little to make it easier to get in her mouth.
Are you nervous about her choking or about allergies? If choking, just give a few small pieces at a time so she can't shove them all in her mouth. As she swallows, give her a few more.
You may find your older child gets more adventurous if the little one is eating things. Just make a big deal about how delicious these things are. Kids like to dip foods too, so make a little ranch dressing or put out hummus and let him dip away! Same thing for French toast dipped in a little real maple syrup (I really don't recommend the fake syrup - it's all high fructose corn syrup with a little maple flavoring). You can also use a little honey. But I find mixing cinnamon in the beaten egg and then sprinkling some more on the egg-covered toast as it's cooking gives it plenty of flavor.
Try things like zucchini bread too - good way to disguise veggies and introduce the taste. My son thought it was "cake" and that's how I got Mr. Picky to eat!
I've also seen a lot of recipes for things like mac and cheese with cauliflower or butternut squash mixed into the cheese. We make burgers with a little grass-fed beef or bison, some ground turkey, and lots of add-ins like black beans, flax seed, sesame seeds, grated onion, chopped spinach (just defrost a little from a bag of frozen spinach), and other things we have lying around to be used up (great use for peppers that have started to go a little soft). The veggies help add moisture to lean meats - a few cubes of burger are nice and soft for a young child.