Toast the almonds in a dry skillet over medium heat for 4–5 minutes, stirring, until fragrant and lightly golden. Transfer to a plate and set aside.
1 cup whole blanched almonds
Add the olive oil and semolina to a large Dutch oven (26 cm / about 5½ quarts). Toast over medium-low heat, stirring constantly, for 4–5 minutes, until the semolina is golden and smells nutty. Take your time; semolina burns easily.
1 cup extra virgin olive oil, 2 cups coarse semolina
Add the brown sugar, cinnamon, cloves, and almonds. Slowly pour in the water, standing back, because the mixture will spatter and steam. Stir for about 10 minutes, until the mixture thickens, bubbles, and pulls away from the bottom of the pot in one mass.
3 cups brown sugar, 1 teaspoon ground cinnamon, 1½ teaspoon ground cloves, 4 cups water
Remove from the heat, cover the pot with a kitchen towel, and let it cool slightly.
Brush a 10-inch nonstick bundt pan with a little olive oil. Spoon in the halva and press it gently so there are no gaps; tap the pan on the counter to settle it. Don't pack it too hard. Cover with a kitchen towel and let it rest for 3–4 hours, until completely firm.
Turn the halva out onto a large serving platter. Dust with cinnamon, slice, and serve.