Easy Zucchini Casserole

Ingredients

• 2 to 4 medium zucchinis (sliced into 1/4-inch half moons (about 6 cups total))
• 1/4 teaspoon salt
• 1/3 cup heavy cream
• 3 large eggs
• 1/4 cup freshly grated Parmesan cheese
• 3 to 4 cloves garlic (minced)
• 1 teaspoon dried basil
• 1/4 teaspoon ground black pepper (adjust to taste)
• a pinch ground nutmeg ((1/8 teaspoon))
• 1 1/2 cups shredded cheddar cheese (divided)
• 2 tablespoons butter (cut into small slices)
• fresh parsley (chopped, for garnish)