No problem here, just give her real food if she's ready for it and seems to prefer it.
One thing that has worked for us is serving left overs from the night before for lunch (we make a little extra each night just for this purpose) , and warming them up in the toaster oven or microwave.
I don't know if you have a Trader Joe's near you, but if you do ,we have found it an excellent source of healthy, easy to prepare food for lunches.
Let's see, good , quick ideas for lunch - you want a balance of protein, veggies, carbs, and fruits.
Try soy hot dogs sliced into thin strips, barilla protein pasta, edamame, and diced chicken, for protein. Your baby is still too young for eggs, cheese, yogurt, cottage cheese, and nuts, which can cause allergies.
She can have most veggies- try sliced avacado, baked sweet potato, organic frozen mixed veggies, steamed baby carrots, and dried veggies - like "just peas".
Rice, rice cakes, cheerios, and quinoa (also high in protein and quick to make), are good grains and carbohydrates. You should still avoid wheat as much as possible, because it is a known allergen.
You want to avoid citrus fruits and strawberries at this point, but try sliced banana, sliced apple or pear with the skin removed, and chunks of fresh melon ( watermelon, cantalope, honeydew, etc.).
Good luck, and feel free to contact me if you need more particulars - this is an area I have a lot of experience and information in. L. S.