He made his first fortune in his native Swaziland, founding a corn milling business in the country in 1958.

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Sabritas buys milled corn from Azteca Milling, which buys the corn from farmers and processes it in its Plainview, Tex.

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Though he's known for upgrading traditional Southern cuisine with cutting-edge techniques (he uses liquid nitrogen in cold-milling corn for grits), Mr. Brock believes cooking simply is just as challenging as cooking with modern gadgets.

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