1. In a 2-quart saucepan over medium heat, sauté garlic and onion in butter until golden, about 3 – 5 minutes.
2. Stir in flour and cook for 1 minute.
3. Slowly whisk in cream and broth and continue cooking until boiling.
4. Once boiling, stir in Romano, lemon juice, hot sauce, and salt; stir until cheese has melted; remove from heat and allow to cool for 5 minutes.
5. Stir sour cream into pan, then fold in dry spinach and artichoke hearts.
6. Fold the mixture into a microwave-safe serving dish, or into several serving-size dishes.
7. Sprinkle cheddar evenly over top(s).
8. At this point, the dip can be refrigerated until ready to serve, if desired. To reheat, microwave dip on 50% power just until cheese has melted.

This reddit post lead me to this recipe.

Mix ingredients and bake at 350 degrees for 20-30 minutes.