Combine honey, fish sauce, chili, tamarind paste, garlic, basil, and mint in a bowl.
Toss in cucumber and radish. Cover and chill until ready to serve.
Season steaks with salt.
Put steaks in a sous vide bag and cook for 40 minutes at 130F.
Transfer steaks to an ice bath.
Brush steaks with red curry paste on both sides.
Sear steaks for 45 seconds per side in a cast iron pan.
Let the steaks rest for 10 minutes.
Serve with cucumber raita.