Brazilian Cheese Rolls

I took a Brazilian cooking class and learned to make these.  My husband says they taste authentic!

INGREDIENTS
1 large egg
1/2 cup milk
1/4 cup canola oil
1 cup tapioca flour (NO SUBSTITUTES!)
1/2 tsp kosher salt
1/4 cup grated sharp cheddar cheese
1/4 cup grated Parmesan cheese

DIRECTIONS
1.  Preheat oven to 400 degrees
2.  Place egg, milk, oil, tapioca flour, and salt in food processor or blender and blend until smooth.  Add cheeses (reserve a little Parmesan to sprinkle on top) and pulse 2 times.  Immediately pour batter into a nonstick mini muffin filling each 3/4 full.  Sprinkle a bit of Parmesan cheese on top.
3.  Bake for 15-20 minutes util puffed and golden.  Remove from oven and cool for a few minutes before removing rolls from pan.  Serve warm.

**TIP - I was told that it is BEST if the cooking ingredients are at room temperature.