Congratulations!! I have a 2 year old DD and these are things we do for her. We like lots of spicy food so I am often cooking semi separate meals hence some of these are a bit nursery food like! eg we might have some chicken in black bean sauce alongside the egg fried rice, or a hot curry with the quinoa/pakoras, or a chilli, chorizo & veg omelette when she has the egg, broccoli & potato.
Egg fried rice with peas/corn/finely diced things like onion/carrot etc mixed through. A smattering of soy sauce if she's anything like my DD and has a taste for salty!
Pasta with homemae pesto is generally a winner here. I ram it full of pine nuts and stuff some spinach in with the basil. Then a little grating of cheddar on top.
One of our most successful and v quick lunch/dinner/even breakfast on occasion(!) is a poached egg with bitesize bits of new potato and broccoli. I toss the spuds and broccoli in butter as she loves it and she will then dunk them all in the egg yolk.
She adores quinoa which, whilst seeming grainlike, is actually a seed and is a complete protein. And tbh I have been known many a time to dish up for her quinoa with grated cheese on top, some cherry toms & cucumber sticks.
Homemade pakoras often go down well. Shred/grate/stick through food processor a mix of veg like onions, carrot, cabbage, frozen peas. Then pour in enough gram flour (ground chickpeas) to coat the veg well. I add some cumin, coriander & garam masala and 1/2 tsp baking powder. Then add water until you have a stiff-ish batter. Fry until golden and then drain on kitchen towel, where they will crisp up. Let cool before giving to her! For adults, add salt once cooked. Deep frying gets the best results, but you can shallow fry too.
Bean chilli. My DD adores chickpeas and beans in general so I do a mix of about 4 different beans + grated up veg & the usual chilli flavourings. Serve with rice/quinoa
Good luck.
And as a PP said, don't over complicate it. In reality DD loves to have a buttered ryvita with some cheese on top, cherry toms & cucumber sticks, then fruit & often some plain greek yoghurt. I feel bad putting so little effort in but actually she's happy and it's healthy so it's fine to wheel that out pretty often!