Onion Hamburger Rolls (Food Processor Method)

I make these onion rolls during the summertime for my son who loves them with his famous hamburgers.

2 eggs
1 medium onion very finely chopped
1/4 cup sweet butter
3/4 cup warm water 105 to 115 degrees F
1 tablespoon dry yeast
1 teaspoon granulated sugar
3 cups (or more) bread flour
2 tablespoons instant nonfat dry milk powder
1 1/4 teaspoons salt

Preheat oven to 375 degrees F.

Melt butter, add onion and cook over medium heat until soft, but not browned.

Add yeast and sugar to hot water and let sit until foamy about 10 minutes.

In a food processor, combine 3 cups flour, 1 egg, milk powder, salt and all but 1/4 cup of the saut