Garlic-Infused Scalloped Sweet Potatoes

Ingredients

Sweet potatoes (2½ lb / 1.1 kg), peeled and thinly sliced

Unsalted butter – 2 tbsp (for sauce base)

Garlic – 4 cloves, minced

Heavy cream – 1½ cups (360 ml)

Milk – ½ cup (120 ml)

Salt – ¾ tsp