How to Make It
Brush canola oil evenly over 1 side of whole-wheat bread slices. Arrange 4 bread slices, oiled side down, on a work surface. Divide thinly sliced fresh mozzarella cheese and shredded Monterey Jack cheese evenly among arranged bread slices; top each with 2 Tbsp. chopped kimchi and 1 bread slice, oiled side up.
Cook sandwiches in a large nonstick skillet over medium-high until toasted and cheese is melted, about 3 minutes on each side.