Three egg yolks - help!
You can make mayo with them a very rich omelet, or they can be frozen in a ice cube tray for later use. They should be placed in a zip bag or small container because they will pick up off odor if left uncovered in your freezer.
You can also use them to make a rich pasta/noodle dough. A egg drop soup or even mu-shu is also possible.
They could be utilized as part of a rich ice cream base(creme anglaise) and even cheesecake would welcome your orphaned yokes. Lemon bars/lemon curd?
Add one teaspoon water or milk, a sprinkle of pepper and salt, whip together, cook as for a flat omelet (until one side is very lightly browned - flip, cook until done). Cut it into strips and use as garnish for salads, soups, stir fried veggies, etc. Strips may be wrapped or bagged and frozen for future use
Easy walnut cookies (it doesn't look like it could work, but it does):
beat the yolks with 1/3 c. sugar until very thick
add 2.25 cups chopped walnuts, 1/2 c date pieces or raisins, maybe some lemon or orange rind.
drop spoonfuls on parchment papered cookie sheet, bake 10 minutes at 325.