Remove the grits from the heat and stir in the roasted garlic paste, white Cheddar and cream. Adjust the seasoning with salt and pepper. Carefully ladle the grits into the ramekins on a baking sheet. Top each ramekin with a slice of yellow Cheddar so the slice just comes over the sides of the ramekin. Bake until the cheese is gooey and bubbly, 2 to 3 minutes. Top with freshly ground black pepper and serve!