Pour the contents of the JUST Egg bottle into a bowl or large measuring cup.
Add flour, baking powder, and black salt if using.
Whisk together and set aside.
In a large skillet over medium-high heat, saute the onions until translucent.
Then, add the mushrooms and cook them until browned. If they stick to the bottom of the pan, use a little vegetable broth or water to loosen them.
Add the diced red peppers and zucchini. Cook for a couple more minutes.
Add the spinach last and stir into the sauteed vegetables. The spinach will wilt when combined with the hot vegetables.
Remove the vegetables from the heat.
Set the tomatoes and dill to the side.
Combine ¼ cup JUST Egg mixture with ¼ cup of sautéed vegetables. Stir together.
Heat the skillet to medium low using a 6-8 inch small skillet or omelette pan.
Add the JUST Egg/vegetable mixture to the pan.
As the omelette cooks, loosen the sides of the omelette with a rubber spatula, pulling the cooked portion away from the sides of the pan while moving the uncooked liquid portions toward the edges of the pan.
When the omelette is brown on the bottom and the liquid has dissipated, flip the omelette over.
Now add the raw tomatoes and dill to one side of the omelette.
Fold over one side of the omelet to cover the side with the tomatoes and dill.
Cook a few remaining minutes.
Serve with toast, hash browns, or breakfast potatoes.