Saute onions and garlic in olive oil in a large skillet, on medium heat for a few minutes, making sure the garlic does not burn.
Add spinach and salt and pepper.
Stir and continue to saute for about 2-3 minutes.
Add cream to the spinach mixture and combine well.
Remove from heat and pour into a baking dish, approx. 9 x 11 inches. (~3 quart casserole dish)
In a separate bowl combine melted butter, Parmesan and bread crumbs.
Stir until combined.
Sprinkle over spinach.
Bake in a 350 oven for 30 minutes and the top is golden brown.
Notes
Store leftovers in an airtight container in the refrigerator for 3-5 days.Substitute regular breadcrumbs for the Panko if you prefer them or can't find Panko breadcrumbs.
Nutritional information is provided as a courtesy and is an estimate only. This information comes from online calculators. Although attempts have been made to provide accurate nutritional information, these figures are only estimates.