Combine milk and corn starch in a small bowl and whisk well to break down any lumps. Pour over a medium size saucepan and cook over medium heat for about 5 minutes, whisking often, until it starts to thicken
Add Cheddar Shreds, reduce heat to medium low and continue cooking for another 5 minutes whisk well so the cheese melts completely
Remove from heat, add tomatoes, jalapeños, scallion and cilantro and mix well. Garnish with sliced scallion, diced tomatoes and jalapeños and chopped cilantro