Cutting Board Fixing

The 1st Cutting Board I bought from the Grocery Store when I moved to the US from France just split in half. Let's fix it together. This is going to be a quick A to Z fix of this Cutting Board.
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Links to Tools and Supplies Used:
- 3M Sanding Sponges 120-Grit Premium Sanding Sponge 3.25-in x 2.126-in (2-Pack) from Lowes ~$10
- BOSCH Power Tools - GET75-6N - Electric Orbital Sander, Polisher - 7.5 Amp, Corded, 6"" Disc Size - features Two Sanding Modes: Random Orbit, Aggressive Turbo for Woodworking, Polishing, Carpentry: amzn.to/3NokZvz
- 3M Xtract Cubitron II Net Disc 710W, 6 in, 12 Piece Multi-Pack Hook and Loop Sanding Discs, 80+, 120+, 180+, 220+, 240+, 320+, Virtually Dust-Free, Assorted Grades, 88516: amzn.to/43E4elL
- ORGENSEN 36-inch Bar Clamps, 90°Cabinet Master Parallel Jaw Bar Clamp Set, 2-pack: amzn.to/3MR6gHY
- Titebond III Waterproof Glue, Gallon: amzn.to/3ITByMT
- OSMO Top Oil Satin: amzn.to/3IWbUY5