6 scallions dark white green separated finely chopped
1 pinch sugar
0.3 cup vegetable oil
2.5 teaspoons white-wine vinegar
0.5 cup milk whole
0.5 teaspoon whole-grain mustard
0.7 cup cornmeal yellow
Equipment
bowl
frying pan
paper towels
sauce pan
whisk
sieve
spatula
Directions
Cook white and pale green scallions in oil in a 10- to 12-inch nonstick skillet over moderate heat, stirring, until softened, 1 to 2 minutes.
Add tomatoes, salt, and pepper and cook, stirring, until tomatoes begin to soften, 3 to 5 minutes.
Remove from heat and stir in scallion greens.
Transfer to a bowl and cool to warm.
Cook corn in a small saucepan of boiling water until tender, about 3 minutes.
Drain in a sieve, then rinse under cold water and pat dry.
Whisk together cornmeal, flour, salt, baking soda, and sugar in a bowl.
Whisk together milk and egg in another bowl, then add to dry ingredients and stir until just combined (do not overmix). Stir in corn.
Heat oil in cleaned skillet over moderate heat until hot but not smoking. Working in batches of 4, spoon 1 heaping tablespoon batter per fritter into skillet and fry, turning over once, until lightly browned, about 4 minutes total.
Transfer with a spatula to paper towels to drain.
Whisk together vinegar, mustard, salt, and pepper in a large bowl, then add oil in a slow stream, whisking until emulsified.
Add arugula and toss to coat.
Divide arugula, fritters, and tomatoes among 8 small plates.