Quiche Tasty But They Stick Bad!

I substituted partially cooked broccali for the sausage, and 4-cheese shredded cheese for the swiss. I used only 3/4 cup milk since I used skim. They tasted great but 1/3 was left stuck to the bottom of my non-stick muffin pan. It isn't new but I sprayed it with olive oil. It took twice as long to cook. Any suggestions on the sticking issue? Has anyone tried the foil baking cups?

Easy, tasty, lots of options for different combos
Recipe Reviewed: 
Mini Mushroom-&-Sausage Quiches
Recipe Rating: 
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