Toast the coconut flakes and almond slivers briefly: heat a small dry skillet over medium heat, add the 1 tablespoon coconut flakes and 1 tablespoon almond slivers, and toss for 90–180 seconds until the coconut is fragrant and edges are golden and the almonds pick up a little color. Why: quick dry-toasting intensifies the nuttiness and adds crunch — the contrast to the silky chia porridge is what elevates this dish to restaurant quality. Transfer to a plate to stop cooking so they don't burn.

Measure and whisk the chia with coconut milk: in a mixing bowl or a wide jar, add 3 tablespoons chia seeds and 1 cup unsweetened coconut milk. If using, add the pinch of salt and 1/4 teaspoon vanilla extract. Whisk vigorously for 30–45 seconds until the chia is evenly suspended in the milk. Why: whisking breaks up seed clumps and exposes all seeds to liquid so they hydrate evenly; the salt and vanilla round and enhance the flavors without adding sweetness.

Let the mixture rest briefly and re-whisk: after the initial whisk, let sit 5 minutes, then whisk again for 10–15 seconds to redistribute any settling seeds. Why: chia seeds can sink and form lumps as they begin to gel; a second whisk ensures a uniformly smooth texture rather than pockets of clumped seeds.

Chill to set: cover the bowl or jar and refrigerate for at least 2 hours, or up to overnight. Why: chilling allows the chia seeds to fully hydrate and create a creamy porridge-like gel — the longer it chills, the thicker and more spoonable the texture becomes.

Prepare the mango: while the chia sets (or just before serving if already chilled), cut the half mango into small dice or slices. Keep a few decorative slices or a small wedge aside for plating. Why: cutting the mango last preserves its bright color and fresh juice, which can otherwise stain or run if cut too early.

Check and adjust texture and seasoning: when you remove the chia porridge from the fridge, stir in the 1/4 teaspoon ground cinnamon. If the porridge is too thick for your liking, stir in 1–2 tablespoons of coconut milk (or water) to loosen it. Taste and, if you'd like more sweetness, stir in a teaspoon of honey or maple syrup (optional). Why: chilling thickens the mixture; final adjustments ensure the porridge is the right consistency and flavor for your palate.

Assemble the bowl: spoon the chilled chia porridge into a serving bowl. Arrange the diced mango on top, leaving some space to show the porridge beneath. Sprinkle the toasted coconut flakes and toasted almond slivers over the mango. Finish with a light dusting of extra cinnamon if desired and the reserved mango wedge for color. Why: layering keeps the toasted toppings crisp and provides pleasant textural contrast to the creamy base, while a final dusting of cinnamon ties the flavors together visually and aromatically.

Serve immediately: enjoy chilled. The texture is best within 12–24 hours; beyond that the chia continues to firm up and will require thinning. Why: fresh fruit and toasted toppings will be at their best immediately and the porridge maintains its ideal creamy texture shortly after preparation.