When you are ready to eat, cook your vermicelli to the time indicated on the package (usually 3 minutes), then drain and rinse well with cold water. Set aside. Prepare your vegetables. In the photo, I used quick pickled cucumbers, purple cabbage, lettuce, cilantro, lime, and fried onions.
To make quick pickled cucumbers, thinly slice 1/4 of an English cucumber, then toss with 1 teaspoon salt and 1 tablespoon sugar. Let sit for 15 minutes, then rinse in cold water.
Heat a large nonstick skillet with 1 tablespoon of oil over medium heat. Fry your remaining 1 tablespoon of minced lemongrass until crispy and golden brown, then drain and set aside, reserving the oil.
Add the marinated meat to the skillet and fry until well charred on both sides. You may need to do this in batches depending on the size of your nonstick skillet.
Arrange vermicelli, vegetables, and beef in a bowl. Toss with 1/4 cup of the fish sauce, then top with fried lemongrass, fried shallots, a squeeze of lime, and sliced chilies, as desired.

Oats
Old-fashioned oats or quick-cooking oats will work here (steel-cut oats will not). Old-fashioned oats lend a more chewy, “rustic” texture. Quick-cooking oats disappear more into the bars. If desired, you can briefly blitz old-fashioned oats in the food processor to achieve the texture of quick-cooking oats.

Make the vegetable foil pack: Fold a large piece of foil in half so you have a double layer. Add the sliced peppers and onions. Season the vegetables with 1 tablespoon of olive oil and sprinkle with 1 teaspoon fajita seasoning.

Fold the sides of the foil up and crimp it tightly on top to make a packet.

Season the steak: Season the steak liberally with the seasoning mix (about 3/4 teaspoon per side).

Preheat your grill to 450°F for high heat grilling.

Grill the packet and the steak: Once the grill is hot, transfer the veggie packet and the steak to the grill. Grill over steak over high, direct heat. After 4 minutes, flip the steak and grill for 5 to 7 additional minutes.

This will finish cooking the steak to about a medium to medium-rare temperature and soften the veggies. Remove both the foil packet and the steak from the grill and let cool for a few minutes.

When you are ready to eat, cook your vermicelli to the time indicated on the package (usually 3 minutes), then drain and rinse well with cold water. Set aside. Prepare your vegetables. In the photo, I used quick pickled cucumbers, purple cabbage, lettuce, cilantro, lime, and fried onions.
To make quick pickled cucumbers, thinly slice 1/4 of an English cucumber, then toss with 1 teaspoon salt and 1 tablespoon sugar. Let sit for 15 minutes, then rinse in cold water.
Heat a large nonstick skillet with 1 tablespoon of oil over medium heat. Fry your remaining 1 tablespoon of minced lemongrass until crispy and golden brown, then drain and set aside, reserving the oil.
Add the marinated meat to the skillet and fry until well charred on both sides. You may need to do this in batches depending on the size of your nonstick skillet.
Arrange vermicelli, vegetables, and beef in a bowl. Toss with 1/4 cup of the fish sauce, then top with fried lemongrass, fried shallots, a squeeze of lime, and sliced chilies, as desired.