Pour olive oil in a sauté pan over medium-high heat. Sauté garlic, onion and poblano for 4 to 5 minutes. Season with salt and pepper. Add corn kernels and continue to sauté for 3 minutes.
Pour mixture over chicken and toss together. Add the prepared salsa and cheese and fold together until fully incorporated. Season with salt and pepper.
Place a small amount of the filling into the center of each tortilla and fold up like a burrito and place onto a baking sheet, seam side down.
Holding the chimichangas together with tongs, carefully place and hold in the oil, for 2 minutes. Gently release the chimichanga from the tongs and continue to fry for 3 to 5 minutes or until golden brown. Drain on paper towels.
For sauce: Place the ingredients into a small bowl and whisk together until fully incorporated. Serve with hot chimichangas.