Grandma's Creamed Spinach

Though my maternal grandmother passed when I was only 6 months old, so I never got to experience her amazing cooking first hand, this is one of her recipes which she passed down to all her daughters. She made it for all holidays, with Sunday Pot Roast and other Sunday dinners. Some of my aunts have slightly altered the recipe, but the original is what I like the best. And in my opinion, this recipe is by far the best Creamed Spinach recipe.

Grandma's Creamed Spinach
Ingredients
10oz package of chopped spinach, thawed and well drained
6-8 tablespoons of butter
1/4 cup finely chopped onion
1-2 tablespoons minced garlic or 1-2 teaspoons garlic powder
1/4 cup flour
1 teaspoon salt (or more to taste)
1 1/2 cups half and half or light cream

Directions
Melt butter in 2quart saucepan. Add onion & garlic, sauté for 2 minutes or until crisp-tender. Stir in flour and salt until well combined. Gradually add in light cream, whisking constantly. Once all lumps are gone, you may stop whisking and bring to a boil; cook and stir for 2 minutes or until thickened. Add the spinach, reduce heat to low, cook uncovered for 5 minutes or until heated thru. This makes about 4 servings, it easily doubles and triples.