Without soya and pulses, meeting the protein needs, especially for a toddler will be a bit hard. It can be done, it will requite a fair amount of reading about the nutritional value of most food. Maybe a nutritionist can help you set up a 4 week meal plan .
You will also need to rely on seeds and nuts. Quinoa is a good source of protein and so is seitan.
Chickpeas are versatile, you can blend them for hummus, roast them, or eat them in salad. Chickpea flour is nice for fritters or muffins. Lentils are usually added to soups, vegan bolognaise or stew. A lot of Indian dishes have lentils. These come in different types, colours and size. If you know how to cook them , they are quite nice. Each has a specific use. You wouldn't put red lentils in a pasta sauce.
You can maybe have twice a week a protein shake for breakfast. I have a pea protein one from time to time.I do mine with soya milk, but other nice alternative are oat milk. You need to be cautious with rice milk as most have very high level of arsenic. Look for a brand fortifies in calcium.
Another thing you need to consider are the Omega 3.
2 tablespoons of grounded flaxseed will give you your daily need . I usually add them to 2 tbl spoon rolled oats and dates. This is maybe the only ingredient you will need to buy from a health shop unless you grind them yourself. Grounded flaxseed need to be stored in fridge. Don't buy them from a shelf.
Adding nutritional yeast to salad or soup (or making a very nice vegan parmesan) is a good way to cover most vitamins from the B group.
I am not sure if all the meals can be done in 30 min, because cleaning, chopping and cooking veggies takes a long time, and if you put more than 1 type of cooked veggies it adds up.
Try to switch to black/brown rice , wholemeal flour (make sure to read ingredients because often the bread labelled wholemeal are in fact wheat flour with added bran which is irritating for the gut) .
I don't buy/eat the lentil pasta or similar. To turn a lentil into a pasta shape take so much engineering that any nutritional value is gone.
How old is your son? Vegan with toddler should be done with a dietician, because their need in protein, iron, calcium, is fundamental for body and brain health. Be careful with some alternative or integrative doctors, some are a bit extreme and here in Australia there have been cases in which a child was harmed.