In a large bowl, whisk together the eggs, half-n-half, and salt; set aside.
Heat the butter and oil in a large skillet over medium-high. Once the butter melts, add the tortillas and cook; stirring, until they are golden and crispy, about 5 minutes.
Add in the onion and saute until tender, about 3 minutes. Stir in the garlic until fragrant, about 30 seconds. Stir in the roasted poblano pepper; season with the cumin and some salt and pepper to taste.
Give the beaten eggs and half n half a quick whisk, then add them to the center of the pan and reduce the heat to medium-low; wait for the edges to just barely start to set, then using a rubber spatula, gently push the eggs from one end of the pan to the other. Continue this process, pausing in between swipes to allow the uncooked egg to settle on the warm pan and cook, gently pushing the liquid to form large curds.
When the eggs are mostly cooked, with big pillow-y folds, but still look slightly wet, slowly fold the eggs into itself just a couple times, bringing them together.
Fold in the pepper jack cheese.
Taste and season with a sprinkle more salt and pepper, only if necessary.
Remove from heat. Serve hot, topped with a little pico de gallo or salsa.
NOTE: Half-n-half is simply equal parts whole milk and heavy cream. For more information and helpful tips, don't miss the full article!