Combine the soy sauce, lime juice, water or broth, fish sauce, Sriracha and brown sugar in a small bowl. Set aside.
Heat the oil in a large skillet over medium-high heat. Add the onion, reduce heat to medium and cook for 3-4 minutes or until beginning to soften.
Increase the heat back up to medium-high, crumble the ground beef into the skillet, stir in the onions (so they don't burn in the following step), and cook, undisturbed, until slightly crisped and browned on the bottom, 2-3 minutes.
Stir the beef and cook until completely cooked, 4-5 minutes, breaking the meat up with a wooden spoon. Add the garlic and Fresno chiles and cook briefly for 25-30 seconds.
Drain off any excess fat in the skillet.
Add the soy sauce combination and bring to a boil.
Add the carrots and snow pea pods. Cook, stirring often for 2-3 minutes or until vegetables are crisp-tender and the pea pods are bright green.
Remove from the heat and stir in the basil until just wilted.
Spoon over cooked brown rice, garnish with remaining scallions with lime wedges on the side.