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1
Cut the corn from the cobs; it will take about 2 ears (or 3 small ears) to make one cup.
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2
Cook the cut corn, garlic, and green chilies (with juice) in butter over medium low heat, stirring, until the corn is tender (careful not to burn!).
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3
Puree the cooked corn mixture in a food processor or blender until pieces are very small, adding extra milk by the tablespoon, up to 6 tablespoons, if necessary for liquidity; set aside (note: some people prefer to not puree the corn mixture, letting it remain chunky).
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4
Cook the potatoes in enough water to cover for about 20 minutes or until tender; drain.
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5
Combine potatoes, milk, sour cream, and seasonings and mash with a manual potato masher or potato ricer (NOT an electric mixer) until smooth.
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6
Stir in the corn mixture and the green chilies and combine well.
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7
Leftover Thunderbolt Patties: combine 2 cups of the leftover Thunderbolt Potatoes, 1 large beaten egg, 1 Tbsp grated Parmesan cheese, and 2 Tbsp flour; shape into 8 patties and dredge in 1/2 cup of cornmeal; cook the patties in 1/2 cup of hot vegetable oil until browned, turning only once.
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8
Note regarding mashing versus using an electric mixer: the best method to make mashed potatoes is, in my opinion, a potato ricer or manual potato masher; using an electric mixer will work the potatoes to the point where the starch molecules break down, causing the potatoes to take on a very sticky and gummy consistency.