Siena province and the Valdichiana, Tuscany — pici are specifically the hand-rolled pasta of the Sienese countryside. The aglione garlic of the Valdichiana is a protected variety, grown in the low valley between Siena and Arezzo. The combination is inseparable.
Pici are the thick, hand-rolled pasta of the Sienese countryside — long, uneven spaghetti-like cylinders made from flour and water only (no egg), rolled by hand on a board to produce irregular thickness. The canonical sauce is aglione: a preparation specific to the Valdichiana area, made from aglione (a large-cloved local garlic variety with a milder, sweeter flavour than standard garlic), crushed and cooked slowly in olive oil until completely soft, then combined with crushed tomato. The result is a deeply garlicky, sweet tomato sauce without the harsh edge of standard garlic — the aglione's sweetness and the slow cooking transforms it into something mellow and complex.
Pici all'aglione has an assertive garlic presence that is completely unaggressive — the long-cooked garlic sweetness, combined with the San Marzano tomato's brightness, coats the thick, chewy pici in a unified, rounded sauce. The pasta's water-only dough has a neutral, slightly wheaty flavour that carries the sauce without competing. It is pure Sienese countryside.
The pici dough: 500g flour (00 or semolina rimacinata), 200ml warm water, a drizzle of olive oil, salt. Knead 10 minutes until smooth. Rest 30 minutes. Roll to a thick sheet (5mm), cut into strips (5mm). Roll each strip between palms and the board, pressing and extending, into long cylinders of uneven thickness (3-5mm). The irregularity is characteristic — perfectly uniform pici are machine-made. The aglione sauce: use the large-cloved aglione of the Valdichiana (or standard garlic in significantly increased quantity, more mildly cooked). Slice the cloves (not mince — slice). Cook in generous olive oil over very low heat for 20-25 minutes until completely soft and beginning to melt — do not allow to brown. Add crushed San Marzano tomatoes. Simmer 15-20 minutes. Season with salt and dried chilli.
Aglione can be ordered from Tuscan specialty suppliers during its brief season (July-October harvest); otherwise, the best approximation is elephant garlic or standard garlic cooked very slowly in much more olive oil than seems necessary. The slow cooking is the key: 25 minutes over very low heat transforms the garlic from sharp and pungent to sweet and creamy.
Using standard garlic at the same quantity as aglione — aglione is significantly milder; the amount of standard garlic required would be overwhelming. Browning the garlic — the aglione must remain pale and sweet; browned garlic creates a bitter sauce. Rolling pici too uniformly — the irregular thickness is correct.
Oretta Zanini de Vita, Encyclopedia of Pasta; Slow Food Editore, Toscana in Cucina