Preheat oven to 350°F and set a rack in the middle position.
In a large bowl whisk together eggs and sour cream. Add milk, mustard powder, oregano, salt and pepper and whisk to fully combine. Stir in half of the cheese. Set aside.
Add oil to a 10" cast-iron skillet over medium heat. When hot add the onion and garlic and sauté until starting to soften about 3 minutes.
Add broccoli and water to the pan and cover to steam the broccoli until just tender about 3 minutes. Remove lid and stir in green onions and whisked egg mixture. Allow to cook over medium-low on the stove for 3-5 until the edge is just starting to set. Sprinkle with remaining cheese and place in the oven. Bake for 12-15 minutes until just starting to set in the centre (it should jiggle a little in the centre). Remove from oven and allow to rest for 5-10 minutes.
Cut into desired wedges and serve immediately.
-Use frozen broccoli if that's what you have, just be sure to thaw completely and pat dry before using. Add to skillet after cooking the onion and cook just to warm (don't add water) before continuing with the recipe.
-Gruyére cheese would also be a nice substitute for the cheddar.
-The cooked frittata will keep for several days well wrapped in the fridge and can be rewarmed gently in the microwave. It does not freeze well.
Preheat oven to 350℉. Cut the top 1/4 off of two bulbs of garlic, place on foil, drizzle with olive oil. Fold foil over the bulbs and crimp to seal packet. Place on a baking sheet and bake for approximately 45 minutes.
Remove from oven and allow to cool to room temperature before squeezing the garlic cloves out of the bulb shell. Set aside.
Preheat oven to 350℉. Make a paste out of the roasted garlic cloves by smearing them with the back of a french knife. Finely chop parsley and combine with roasted garlic and olive oil. Drizzle oil mixture over the bread cubes and toss to combine. Spread out in a single layer on a parchment lined baking sheet and bake for approximately 30 minutes, tossing at least once during baking time.
In a blender, using short pulses, combine eggs, vinegar, roasted garlic, anchovy paste, worcestershire sauce, dijon, and mustard powder.
With blender on medium speed add olive oil gradually in a thin stream to egg mixture. Once thick and emulsified add parmesan cheese and pulse twice to combine. Add cracked black pepper and course sea salt to taste.
Slice sheets of prosciutto into 1/4 slices. Heat olive oil in a non stick skillet over medium heat. Add prosciutto and cook until crispy, tossing occasionally. Remove from heat and drain on paper towel to remove excess fat.
Arrange lettuce on plate and drizzle with dressing. Top with croutons and crispy prosciutto. Add shaved parmesan if desired.
It is easier to cut each prosciutto slice into strips than it is to stack the slices, cut and separate each slice. The pasteurized eggs used where purchased in a carton.