In a heavy bottomed oven proof pan (I used a 12"cast iron skillet), add in your bacon and cook on medium to medium low heat. Cook for a few minutes until about 3/4 done.
Add in your leeks. Season with a little salt and pepper. Saute for another minute or so.
Add in your chopped asparagus. Season with a bit more salt to taste. Cook another minute then add in your peas.
In a seperate bowl, mix together your eggs, cream and milk. Add a pinch of salt and a few grinds of pepper.
Turn off the heat, and pour your egg/cream mixture into the pan with your veggie mixture.
Dot with cubed cheddar.
Bake for 20-25 minutes until just set
For chimichurri
Finely chop your parsley, garlic and serrano pepper
Add in red wine vinegar, olive oil, oregano and salt and pepper to taste
Mix well and serve.
To Serve
Let your quiche cool for a few moments. Serve with sliced avocado and drizzle with chimichurri to taste.