I only started a plant based diet 8 days ago, I am celiac so on a Gluten Free diet.
Just a few things I have been eating - organic cornflakes with rice milk or GF toast with a nut better for breaky or I juice some fruit/veg. Dinner I have been making things like Dahl (lentils) with rice and I add lots of veggies and beans. A stirfry using glass noodles and lots of veg, chickpea and pumpkin curry with rice, sushi, roast veggies, salads, fried rice. I usally try make enough left overs for lunch. I do eat nuts and dried fruits as snacks.
I find it hard to find a grain alternative, not keen on Quinoa but I am trying to introduce it by mixing it with the rice. I think I am getting enough protein. I havent had any soy products except for Tamari sauce, not a fan of tofu yet either hoping it will grow on me.
It is so much more challenging with other food allergies, I had many food intolerances a year ago, and I avoided all nightshades for at least 6 months, then just reintroduced them last week when I started a plant based diet and I dont have the usual symtoms which for me was bloating and constipation. I am hoping I can now tolerate small amounts of my food intolerances.
Good luck !