Combine all ingredients in a blender.

To make for a tender crepe, place batter in fridge for at least one hour. (You can prepare the batter the night before.)

Use a crepe maker or a frying pan to make the crepes, spraying with cooking spray between every few leaves.

Defrost spinach in the microwave or thaw at room temperature.

Pour into a strainer and squeeze out all liquid. You will be left with just over a cup of spinach. Place all filling ingredients in a small bowl and mix together. Set aside.

Heat oil and butter in a large frying pan.

Sauté onion, carrot, and mushrooms for approximately 12 minutes, stirring occasionally.

Meanwhile, preheat oven to 350 degrees Fahrenheit (175 degrees Celsius).

Add the flour and mix to coat the vegetables. Add the cooking cream or half-and-half, wine, cheese, and seasoning. Stir for a minute or two until cheese is melted and all ingredients are well combined. Add a few spoonfuls of this mixture to the spinach filling and mix well.

Place a spoon of spinach filling mixture on each crepe and roll up. Put blintzes in a baking dish, preferably Pyrex, lined with parchment paper. They can be very close together. Spoon remaining sauce over blintzes.

Spray a large piece of aluminum foil with cooking spray, and cover baking dish (sprayed side down, so it won’t stick).

Bake for 20 minutes covered, then 10 minutes uncovered. Garnish with chopped chives, if desired.