NGOUDA DIONE and ELODIE TOTO SENEGALESE cook Amy Gueye always tries to use imported rice at her family-run restaurant in Dakar, knowing that customers prefer the taste to home-grown varieties when they buy her spicy rice-based fish and chicken dishes. Senegal's rice production has soared in recent years as it seeks to reduce dependence on imports, but the population across West Africa has also risen fast, meaning countries still rely on Asia for supplies, particularly high-quality produce. With concern growing over food security across Africa, prompted by trade disruptions caused by the pandemic and the war in Ukraine, that dependence is now…