Broccoli Au Gratin

1 medium head broccoli (roughly 1 packed cup prepared)
3 yukon gold potatoes (roughly 2 1/2 cups prepared)
1/2 tsp cumin seeds
1/2 tsp fenugreek seeds
2 cloves garlic -minced
1 Tbl fresh oregano -minced
2/3 cup milk
2/3 cup sharp cheddar
sea salt and pepper to taste
1/2 tsp dried red pepper flakes
olive oil
8x8 baking dish