Cut the tortillas into 6 triangles each. Add the oil to a heavy-bottom pan over high heat. Once the oil is shimmering, add a few of the tortilla triangles at a time and fry for about 1 minute on each side until they are crisp. Remove from the oil and transfer to a paper towel. Sprinkle with sea salt.

In a large pan over medium heat, add the olive oil. Add onion and garlic and cook until translucent, about 6 to 8 minutes.

Add spinach and cook until completely wilted, about 5 to 8 minutes. Transfer to a colander and drain, pressing the spinach down to release all excess liquid.

In the same pot, warm the milk over high heat. Whisk in cream cheese until smooth and melted, about 3 minutes.

Add spinach, Worcestershire sauce, red pepper flakes, and mozzarella and stir to combine. Season with salt and pepper.

Simmer over medium-low heat until ready to serve. Transfer to serving dish and serve with tortilla chips.