Preheat your oven to 375°F. Prepare an 8x8-inch baking dish with a light coating of nonstick cooking spray.
In a large skillet, heat 1 tablespoon olive oil over medium heat. Add ½ cup finely chopped sweet onion and sauté for 3 to 5 minutes until soft and translucent.
Stir in 4 cloves of minced garlic, 1 teaspoon kosher salt, ½ teaspoon ground black pepper, and ½ teaspoon cayenne pepper. Let that cook for about 30 seconds until fragrant.
Add in 2 cups of chopped spinach and cook until wilted.
Turn off the heat and stir in 14 ounces of roughly chopped halved artichoke hearts.
In a large mixing bowl, combine (1) 8-ounce block of cream cheese and ½ cup plain Greek yogurt. Stir until the ingredients are mostly smooth.
Fold in the spinach-artichoke mixture and 1 cup pepper jack cheese. Mix all the ingredients well to combine.
Transfer everything to your prepared baking dish. Smooth out the top with a rubber spatula. Top with the remaining cup of shredded pepper jack and ⅓ cup sliced sweet cherry peppers.
Bake uncovered for 15–20 minutes or until hot and bubbly around the edges.
Let cool slightly, then sprinkle with 1 tablespoon chopped fresh parsley before serving.