To start, preheat your oven to 400 degrees F.
Using a cookie cutter, cut flour tortillas into 3-4" circles until you have 12 of them.
Use a pastry brush to brush a little bit of olive oil on both sides of each tortilla circle.
Place the tortillas on a baking sheet lined with parchment paper, then place them in the oven for 10-14 minutes, flipping them over halfway through. Be sure to check often towards the end of the baking time to prevent burning. You can tell the tortillas are done when they become golden.
While the tortillas are baking, make the avocado mash. First, wash and dry your lemongrass. Cut a 4-inch piece off of the stalk, and carefully use a knife to cut into the top, woody layer of lemongrass, and peel it away (Watch me do it here). Then, cut the peeled lemongrass into small rounds with a sharp knife. Add the sliced lemongrass to a little bowl, then squeeze the lemon juice on top of it. Using a spoon, mix them together so the lemongrass infuses into the lemon juice. Set aside.
Cut your avocados in half, removing the pits, and scoop the green flesh out into a bowl. Mash the avocado using a potato masher or a sturdy fork.
Then, strain the lemon juice mixture into the avocado mash (keeping the lemongrass solids out), then add in the chives, black pepper, and salt. Mix well, then taste and adjust seasonings to your preference.
Once the tortillas are done baking, take them out of the oven and let them cool slightly, preferably on a baking rack.
Once the tortillas are cooled, add on the avocado mash, and top with whatever toppings you'd like.
Serve and enjoy!