Welcome Bev!
Very good questions!
You can obtain DHA and EPA fatty acids from a vegan supplement, such as "Ovega-3" (maybe you already saw the link in another thread?).
Calorie-dense plant foods include nuts, nut butters, seeds, and dried fruits. Nuts and seeds contain 650 to 1000 calories per cup (depending on which type). Nut butter contains about 100 calories per tablespoon. Raisins contain about 500 calories per cup. You can look up additional foods on a calorie data website, such as http://www.calorieking.com.
As you've noted, yogurt can be a good source of probiotics. If you are interested in non-dairy probiotics, you might try kimchi (from the Korean food market), miso, tempeh, or sauerkraut - all of these are affordable. Here is an article about prebiotics and probiotics, published by the Academy of Nutrition and Dietetics (the world's largest association of Registered Dietitians): http://www.eatright.org/resource/fo...ods/prebiotics-and-probiotics-the-dynamic-duo
Regarding your hypertension: You might find it useful to make 1 or 2 appointments with a Registered Dietitian who specializes in cardiovascular disease and in vegetarian nutrition. They can work with you and your physician to tailor your food choices towards improving your blood pressure.
In the Santa Cruz area, there are a couple of Registered Dietitians who specialize in vegetarian nutrition (see below ). You an also find a local RD through the Academy of Nutrition and Dietetics' website: http://www.eatright.org . Just click on the "Find an Expert" button, located in the upper-right-hand portion of the webpage.
Registered Dietitians in the Santa Cruz area:
Jocelyn Dubin, MS, RD
130 Walnut Avenue
Santa Cruz, CA 95060
Phone: 831/429-9355
Email: [email protected]
Website: http://www.nourishsantacruz.com/nutrition/
Lea Crosetti, RD
1737 Granite Creek Rd
Santa Cruz, CA 95065
Phone: 831/818-0194
Email: [email protected]
Website: http://nutritionbylea.com/medical-nutrition-therapy/