My sister uses onion powder in her cooking "experiments".
She doesn't care for the texture of cook or raw onions. And I ruined tomatoes for her. When we were kids I would grab a tomato and the salt shaker and go sit on the back steps. I ate the tomato like an apple. My sister tried it and the seeds squirted all over her and she thought it was gross.
But she will eat tomatoes in sauces if its pureed or cooked down quite a bit.
My husband and I love onions. He likes a nice slice of fresh red onion alongside his pinto beans. I will take nice slices of onion and brown them with a little cooking spray in a frying pan and put it on top of a hamburger patty and a thin slice of melted cheddar. YUMMY!!