Cheesy Mushroom-Chorizo Frittata

To save time in the morning, assemble this the night before and then turn on the cooker first thing in the morning for a leisurely brunch main dish. (It also makes a good light supper choice.) Vegan frittatas hold well in the slow cooker and are best prepared in a wide, shallow cooker. It can be a little difficult to remove the first piece of the frittata, but after that, the pieces are easier to get out.