MAKE FILLING LAYER: ° Sauté veggies: Heat oil in large skillet to medium-high heat. Add onions and carrots. Sauté for 5 minutes, stirring occasionally. ° Sauté 'beef': Add plant based beef and chop it up into small pieces with a rubber spatula or wooden spoon. Stir in garlic, rosemary, thyme, salt, pepper, tomato paste, Worcestershire sauce. Sauté, stirring occasionally, for 4 minutes, until 'beef' is brown. ° Make gravy: Stir in flour for 2 minutes. Add broth/wine, frozen corn and spinach. Stir to combine well. Let simmer for 3-4 minutes to let the mixture thicken for a rich gravy. Taste and adjust seasonings.