Sauté the spinach and garlic: In a small pan, melt the butter over medium heat. Add the minced garlic and sauté for about 1 minute until fragrant. Add the chopped spinach and cook until wilted. Season with a pinch of salt and pepper.

Mix the ingredients: In a mixing bowl, combine the sautéed spinach and garlic with the softened cream cheese, sour cream, and shredded Irish cheddar. Stir until all ingredients are well combined.

Bake the dip: Preheat the oven to 350°F (175°C). Transfer the spinach and cheese mixture into a small baking dish. Bake for about 15 minutes, or until the top is bubbly and golden.

Serve: Once baked, remove from the oven and serve immediately with low-carb crackers, veggie sticks, or keto-friendly bread for dipping.