Preheat grill to medium. Place cast iron skillet or other grill-safe skillet on one side of the grill to preheat.
Combine cream cheese, cheddar cheese and 1 teaspoon seasoning in a small bowl. Can be made ahead and chilled.
Place English muffins cut side down on grill over direct medium heat. Grill muffins 2-3 minutes until lightly browned. Remove to serving tray. Spread bottom halves with cheese spread and return to grill. Grill until bottoms are lightly toasted, about 2 minutes. Remove to serving tray.
Add butter to skillet and heat until melted while toasting muffins. Add 1 teaspoon seasoning. Break eggs into skillet; cook 4-8 minutes, flipping when egg white is mostly set. Grill Canadian bacon for 3-4 minutes, turning once.
Place Canadian bacon on top of cheese spread. Top with egg and finish with top half of the English muffin. Serve immediately.
Use Weber® Roasted Garlic & Herb Seasoning for savory flavor.