In a medium saucepan over medium-high heat, heat the canola oil. Add the spinach and garlic and saute until spinach is wilted, about 3 minutes.
Reduce heat to medium-low, add the American cheese, Monterey Jack cheese, and ¼ cup of the Pepper Jack cheese. Pour in milk. Stir constantly until cheeses are completely melted.
Pour mixture into a small oven-safe casserole dish. Sprinkle with remaining Pepper Jack cheese. Broil until top layer starts to turn golden brown, 3-5 minutes. Remove from oven.
Top with a dollop (or two) of guacamole and pico de gallo and sprinkle with fresh cilantro. Serve with chips and watch is disappear!
Recipe by Simple, Sweet & Savory at https://www.simplesweetsavory.com/chilis-copycat-white-spinach-queso/