Vegan Hot Pockets - broccoli cheddar style! (freezer and kid-friendly)

Ingredients

• 1 large potato (peeled and diced)
• 1 medium carrot (peeled and diced)
• 1/2 small onion (diced)
• 1/4 cup extra virgin olive oil
• 1.5 tsp lemon juice
• 1.5 tsp yellow mustard
• 2 large cloves garlic
• 1/4 cup nutritional yeast
• 1 tsp sea salt
• 2 cups broccoli (roughly chopped)
• 1 cup whole wheat pastry flour
• 1 cup unbleached all-purpose flour
• 2/3 cup vegan butter* (such as Earth Balance)
• 1/2 tsp sea salt